<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-11-06</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0002027708</issuerCik>
        <issuerName>Cantor Equity Partners I, Inc.</issuerName>
        <issuerTradingSymbol>CEPO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001910592</rptOwnerCik>
            <rptOwnerName>Harraden Circle Investments, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001927544</rptOwnerCik>
            <rptOwnerName>Harraden Circle Investors GP, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001927546</rptOwnerCik>
            <rptOwnerName>Harraden Circle Investors GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001700249</rptOwnerCik>
            <rptOwnerName>Harraden Circle Investors, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002002581</rptOwnerCik>
            <rptOwnerName>Harraden Circle Special Opportunities, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002057256</rptOwnerCik>
            <rptOwnerName>Harraden Circle Strategic Investments, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001927576</rptOwnerCik>
            <rptOwnerName>Fortmiller Frederick Vincent Jr.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>885 THIRD AVE.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2600B</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2025-11-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>250000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.425</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2048679</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Remarks</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks>These ordinary shares of the Issuer (&quot;Shares&quot;) are directly owned by Harraden Circle Investors, LP (&quot;Harraden Fund&quot;), Harraden Circle Special Opportunities, LP (&quot;Harraden Special Op Fund&quot;), and Harraden Circle Strategic Investments, LP (&quot;Harraden Strategic Fund&quot;). Harraden Circle Investors GP, LP (&quot;Harraden GP&quot;) is the general partner to Harraden Fund, Harraden Special Op Fund, and Harraden Strategic Fund, and Harraden Circle Investors GP, LLC (&quot;Harraden LLC&quot;) is the general partner of Harraden GP. Harraden Circle Investments, LLC (&quot;Harraden Adviser&quot;) serves as investment manager to Harraden Fund, Harraden Special Op Fund, and Harraden Strategic Fund. Frederick V. Fortmiller, Jr. (&quot;Mr. Fortmiller&quot;) is the managing member of each of Harraden LLC and Harraden Adviser. Each of Harraden GP, Harraden LLC, Harraden Adviser, and Mr. Fortmiller disclaims beneficial ownership of the Shares reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the Shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.</remarks>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE INVESTMENTS, LLC, By: /s/ Frederick V. Fortmiller, Jr., Title: Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE INVESTORS GP, LP, By: HARRADEN CIRCLE INVESTORS GP, LLC, its general partner, By: /s/ Frederick V. Fortmiller, Jr., Title: Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE INVESTORS GP, LLC, By: /s/ Frederick V. Fortmiller, Jr., Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE INVESTORS, LP, By: HARRADEN CIRCLE INVESTORS GP, LP, its general partner, By: HARRADEN CIRCLE INVESTORS GP, LLC, its general partner, By: /s/ Frederick V. Fortmiller, Jr., Title: Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE SPECIAL OPPORTUNITIES, LP, By: HARRADEN CIRCLE INVESTORS GP, LP, its general partner, By: HARRADEN CIRCLE INVESTORS GP, LLC, its general partner, By: /s/ Frederick V. Fortmiller, Jr., Title: Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HARRADEN CIRCLE STRATEGIC INVESTMENTS, LP, By: HARRADEN CIRCLE INVESTORS GP, LP, its general partner, By: HARRADEN CIRCLE INVESTORS GP, LLC, its general partner, By: /s/ Frederick V. Fortmiller, Jr., Title: Managing Member</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>FREDERICK V. FORTMILLER, JR., /s/ Frederick V. Fortmiller, Jr.</signatureName>
        <signatureDate>2025-11-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
